﻿300 
  Gooch 
  and 
  Walker 
  — 
  Analysis 
  of 
  Iodides. 
  

  

  ric 
  acid 
  was 
  complete, 
  and 
  the 
  free 
  iodine 
  was 
  estimated 
  by 
  

   titrating 
  decinormal 
  arsenious 
  acid, 
  the 
  manipulation 
  being 
  

   like 
  that 
  previously 
  described 
  in 
  detail. 
  

  

  The 
  average 
  result 
  of 
  a 
  series 
  of 
  several 
  determinations 
  in 
  

   which 
  a 
  great 
  excess 
  (0*1 
  grm.) 
  of 
  potassium 
  iodate 
  was 
  used, 
  

   proved 
  to 
  be 
  practically 
  identical 
  with 
  that 
  of 
  a 
  similar 
  series 
  

   in 
  which 
  only 
  a 
  small 
  excess 
  of 
  the 
  iodate 
  was 
  employed, 
  so 
  

   that 
  it 
  appears 
  to 
  be 
  unnecessary 
  in 
  any 
  practical 
  work 
  to 
  

   restrict 
  the 
  amount 
  of 
  iodate 
  below 
  the 
  amount 
  necessary 
  to 
  

   decompose 
  the 
  maximum 
  quantity 
  of 
  potassium 
  iodide 
  which 
  

   we 
  have 
  handled, 
  namely, 
  0"4 
  grm. 
  

  

  It 
  appears 
  that 
  for 
  the 
  estimation 
  of 
  iodine 
  in 
  a 
  soluble 
  

   iodide 
  free 
  from 
  notable 
  amounts 
  of 
  chlorides 
  or 
  bromides, 
  

   this 
  method, 
  depending 
  as 
  it 
  does 
  upon 
  a 
  single 
  standard 
  solu- 
  

   tion, 
  is 
  simple, 
  fairly 
  accurate, 
  and 
  rapid. 
  

  

  